AN/APQ-13

It was used on B-29s during World War II in the Pacific theater for high altitude area bombing, search and navigation.

A range unit permitted a high degree of accuracy in locating beacons.

The radome was carried on the aircraft belly between the bomb bays and was partially retractable on early models.

The radar operated at a frequency of 9375 ± 45 megahertz and used a superheterodyne receiver.

[1] The last operational APQ-13 was removed from the Fort Sill, Oklahoma post weather station in October 1977 for display at what is now the National Museum of the United States Air Force.